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Discussion Starter #1
Anyone use +2 on the rear? Is chain long enough? Or -1 in front, any rubbing issues?
 

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Anyone use +2 on the rear? Is chain long enough? Or -1 in front, any rubbing issues?
Hello there :smile_big:and Welcome to the Team..!

I've never had an issue going up 2 teeth on any of the dozens of motos owned.

I'd rather go up 2 teeth in the back, than down 1 in the front, (which is closer to 2.5 in the rear, iirc).

But of course, this depends on what sort of riding you're looking to do.
 

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I dropped a tooth on the front and it was the best $25 I've ever spent on a bike upgrade.

No issues with clearance or fitment - very simple swap out from the stock unit. Very little geometry change as well so no need to adjust ride height or anything at least for my tastes.

The gearing commander website said it lowers top speed by roughly 12kph which is no issue for me - 225kph down to 213kph or whatever it is.
 

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Hi .well it is a small world .

Have got the genuine powerparts KTM (orange) standard sized rear sprocket fitted with the orange chain .

After experiencing a few heavy/ traffic ,filtering episodes ( clutch slip to control poor low speed engine running )

Decided to change the drive sprocket X1 teeth lower to see if it would help .

Glad to say yes it did ,slow speed response & filtering in heavy traffic much better .

loss of top speed no real difference felt as the bike has no fairing protection .over say 70 mph+ ? On uk roads with wide bars you start to hang on anyhow ..

Found it a worthwhile exercise & cost of the front drive gear / ease of fitting negligble *
 

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Discussion Starter #8
I ended up going -1 in front and it is significantly better 30-40mph. I’m tempted to go +1 in rear too!
 

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My wife runs a 790 duke, we changed the rear to a +2 teeth, makes a really nice differance and the bike is a lot better in traffic. The standard chain isnt long enough though, even with the block turned round. I would recommend it over the front, more expensive but easier on the chain, and wear increasing on the swingarm.
 

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I ordered sizes 39-42 to play with. We have a variety of tracks to ride so the gearing will change with each track I am sure. I will also try +1,-1 on the front.
 

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Don't all you guys messing with your final gearing care that the speedo's off now? That'd bug me. Maybe there's a way to adjust it through the TFT?
 

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Don't all you guys messing with your final gearing care that the speedo's off now? That'd bug me. Maybe there's a way to adjust it through the TFT?
My understanding is that the speedo uses the front wheel ABS ring. Seen vid's of 1290SDR and the speed drops to 0 when they're up on the back wheel.
 

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Don't all you guys messing with your final gearing care that the speedo's off now? That'd bug me. Maybe there's a way to adjust it through the TFT?
Every KTM I have ever owned (had a few!!) runs the speedo off the front wheel, try doing a decent wheelie and you will see!!!!:grin::grin:
 

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Every KTM I have ever owned (had a few!!) runs the speedo off the front wheel, try doing a decent wheelie and you will see!!!!:grin::grin:
I guess owning a 790 I don't have much of a choice :devil:

Every time I lift the wheel off the ground I'm too nervous to look down at my dash :eek:
 

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Don't all you guys messing with your final gearing care that the speedo's off now? That'd bug me. Maybe there's a way to adjust it through the TFT?
For other bikes you can use a Healtech Speedo Healer. My wife's used one for 10 years on her last CBR and we'll need another for her new one. They also do quickshifter boxes as well, another product we don't need for our lovely 790's. :)
 

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Don't all you guys messing with your final gearing care that the speedo's off now? That'd bug me. Maybe there's a way to adjust it through the TFT?
For other bikes you can use a Healtech Speedo Healer. My wife's used one for 10 years on her last CBR and we'll need another for her new one. They also do quickshifter boxes as well, another product we don't need for our lovely 790's. /forum/images/smilies/smile.gif
Has Rick says you can use a speedo healer. Even by changing the gear ratio the wheel still makes the same amount of rotation per mile. You would need to change the tire height to mess up the speedo more then it is already are. I’ve check it with a GPS and be like other peoples says it’s about 5% off. In my case i kind a like it, because when I go a bit over the limit like 125(It is well known that most police around here accept 20 km/h over the actual limit on highway). It make my subconscious to think I’m illegal even if I’m not 😉. So it could be good to save me some tickets..... maybe.
 
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